358 battery tray R&R
 

Has anyone installed bigger battery trays in their sonic? I bought two group 30 battery trays from Dana Marine and new AGM batteries to install. Had an issue with my truck sat morning so it's at the shop so I can't pull the boat to my house where i have a full compliment of tools. Are the trays from the factory bolted in or screwed? I want to get the batteries in before this weekend so I can use the boat.